China owned $1.3 trillion of U.S. Treasuries as of June, making it the biggest holder of U.S. debt.
But China's foreign-exchange reserves plunged by a record $94 billion in August, according to the country's central bank, leaving it with a war chest of $3.6 trillion. Analysts say it's very safe to believe a big chunk of that decline occurred due to a reduction in U.S. Treasury holdings.